You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
package literals
|
|
|
|
import (
|
|
cryptrand "crypto/rand"
|
|
"fmt"
|
|
"go/ast"
|
|
mathrand "math/rand"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
// obfuscator takes a byte slice and converts it to a ast.BlockStmt
|
|
type obfuscator interface {
|
|
obfuscate(data []byte) *ast.BlockStmt
|
|
}
|
|
|
|
var (
|
|
// obfuscators contains all types which implement the obfuscator Interface
|
|
obfuscators = []obfuscator{
|
|
xor{},
|
|
swap{},
|
|
}
|
|
envGarbleSeed = os.Getenv("GARBLE_SEED")
|
|
)
|
|
|
|
// If math/rand.Seed() is not called, the generator behaves as if seeded by rand.Seed(1),
|
|
// so the generator is deterministic.
|
|
|
|
// genRandBytes return a random []byte with the length of size.
|
|
func genRandBytes(buffer []byte) {
|
|
if strings.HasPrefix(envGarbleSeed, "random;") {
|
|
_, err := cryptrand.Read(buffer)
|
|
if err != nil {
|
|
panic(fmt.Sprintf("couldn't generate random key: %v", err))
|
|
}
|
|
} else {
|
|
_, err := mathrand.Read(buffer)
|
|
if err != nil {
|
|
panic(fmt.Sprintf("couldn't generate random key: %v", err))
|
|
}
|
|
}
|
|
}
|
|
|
|
func genRandIntSlice(max, count int) []int {
|
|
indexes := make([]int, count)
|
|
for i := 0; i < count; i++ {
|
|
indexes[i] = mathrand.Intn(max)
|
|
}
|
|
return indexes
|
|
}
|